US4430544A - EDM Machine tool with compounded electrode-reciprocation and servo-feed drivers - Google Patents

EDM Machine tool with compounded electrode-reciprocation and servo-feed drivers Download PDF

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Publication number
US4430544A
US4430544A US06/289,147 US28914781A US4430544A US 4430544 A US4430544 A US 4430544A US 28914781 A US28914781 A US 28914781A US 4430544 A US4430544 A US 4430544A
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United States
Prior art keywords
electrode
rotary member
motor means
edm
machining
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US06/289,147
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English (en)
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Kiyoshi Inoue
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Inoue Japax Research Inc
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Inoue Japax Research Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • B23H7/32—Maintaining desired spacing between electrode and workpiece, e.g. by means of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • B23H7/30—Moving electrode in the feed direction

Definitions

  • the present invention relates to an electrical discharge machining (EDM) machine tool with a compound electrode-reciprocation and servo-feed drivers and, more particularly, to a novel and improved EDM machine tool with such a driver system and to a method utilizing such a driver system.
  • EDM electrical discharge machining
  • a tool electrode in the form of a three-dimensionally shaped solid body or piece of sheet metal is juxtaposed with a workpiece electrode across a machining gap filled with a liquid machining medium or dielectric (e.g. kerosene, transformer oil, distilled water or weakly conductive water).
  • a liquid machining medium or dielectric e.g. kerosene, transformer oil, distilled water or weakly conductive water.
  • the tool electrode is advanced relatively towards the workpiece electrode by a servo system adapted to maintain the machining gap substantially constant in size, thereby permitting material-removal discharges to be successively created and the tool electrode to be progressively sunk into the workpiece electrode so that a cavity generally conforming in shape to the tool electrode and of a desired depth may eventually be formed in the workpiece electrode.
  • the tool electrode may be advanced vertically by displacing a supporting machine-head spindle with the servo system motor and additional relative movements may be imparted to the tool electrode and the workpiece electrode in a horizontal plane orthogonal to the spindle axis so as to generate in the workpiece a cavity similar in shape to the tool electrode or different therefrom.
  • Parameters of individual and successive electrical discharges i.e. pulse on-time ( ⁇ on), peak current (Ip) and off-time ( ⁇ off) are determinative of machining results, e.g. removal rate, surface roughness and relative electrode wear and, therefore, are individually or in combination particularly adjusted to establish a particular machining condition suitable for achieving the desired machining end result factors.
  • the electrode-feed servo-control system In order to increase the removal rate, it is also desirable to operate the electrode-feed servo-control system so as to minimize production of non-striking pulses, i.e. pulses which do not cause discharge.
  • the gap spacing can accordingly be reduced but this can also facilitate production of a continuous arc or result in difficulty in gap flushing or decontamination.
  • the attempt to facilitate machining discharges tends to lower the removal rate while the setting of the servo system so as to widen the threshold gap spacing leads to an increased frequency of non-striking pulses.
  • a reliable and accurate mechanical arrangement is essential to achieve desired movements of the tool or movable electrode and that this arrangement should also desirably operate in conjunction with the machining liquid flushing unit.
  • a common motor has typically been used to perform both the servo and electrode reciprocating operations; the motor has been coupled drivingly with the machine-head spindle and operated in response to signals furnished from two independent sources.
  • the tool electrode must be reciprocating driven so as to be integral with the machine-head spindle; it has been found that, especially when it is moved down in each reciprocating cycle at a high speed, it tends to over-travel and tends to collide with the workpiece electrode, thus damaging the tool or workpiece electrode or both.
  • an important object of the present invention to provide a novel and improved EDM machine tool having a relatively simple and inexpensive mechanical structure which allows reliable, accurate and fail-safe servo-feed and electrode reciprocation operations to be achieved.
  • Another important object of the invention is to provide an EDM machine tool whereby both the stroke and period of the electrode reciprocation are adjustable without the inconvenience of interdependence and over relatively wide ranges.
  • a further important object of the present invention is to provide a novel and improved EDM method which is capable of reducing the total machining time in comparison with that of the conventional practice for a given EDM operation.
  • an EDM machine tool of the class wherein a tool electrode and the workpiece electrode one of which is movable, are spacedly juxtaposed with one another to define a machining gap therebetween in the presence of a liquid machining medium and a succession of electrical discharges are effected between the tool electrode and the workpiece electrode across the machining gap to electroerosively remove material from the workpiece electrode
  • machine tool comprises in combination: a machine-head spindle for supporting the movable electrode; first motor means drivingly coupled with the machine-head spindle and responsive to electrical conditions in the machining gap for axially displacing the spindle to move the movable electrode towards and away from the other electrode so as to maintain the machining gap in size substantially constant; and an electrode reciprocating assembly mechanically coupled between the machine-head spindle and the movable electrode and including a rotary member, second motor means drivingly coupled with the rotary member for reciprocating rotating the rotary member through a limited angle of rotation
  • the machine tool further comprises reciprocation period setting means associated with the second motor means for determining the rate of rotation of the reciprocating rotated rotary member to set the period of rectilinear reciprocatory movement of the movable electrode at a desired value.
  • Program means may be associated with at least one of the setting means to act on the second motor means for changing at least one of the said angle and rate of rotation in accordance with a preprogrammed format during a given course of EDM operation.
  • machining depth sensing means may be provided for sensing the position of the tool electrode as it is progressively sunk into the workpiece electrode during a given course of EDM operation and controlling at least one of the setting means to act on the second motor means, thereby changing at least one of the said angles and rate of rotation in accordance with the sensed position of said tool electrode during the course of EDM operation.
  • detector means may be provided responsive to EDM characteristics in the machining gap for controlling at least one of the said setting means to act on the second motor means, thereby changing at least one of the said angles and rate of rotation in accordance with the sensed EDM characteristics during a given course of EDM operation.
  • means is provided for interrupting the operation of the first motor means for a predetermined time period and permitting the second motor means to be operated selectively during the said time period.
  • the reciprocating assembly may further comprise a housing securely connected to the machine-head spindle for receiving the rotary member, the second motor means and the link means therein and a piston member arranged coaxially or in parallel with the tool-head spindle and coupled between the link means and the movable electrode.
  • An insulator plate is advantageously disposed between the machine-head spindle and the housing, or the housing advantageously is detachably secured to the machine-head spindle by means of an insulator plate.
  • the rotary member may be an eccentric cam having a cam shaft rotationally driven by the second motor means and a cam surface in engagement with a planar surface of a body constituting the link means.
  • the body may be a plate attached to the piston member.
  • the rotary member may be a disk rotatable about its shaft and driven by the second motor means and having a crankshaft coupled to the piston.
  • the invention also provides, in a second aspect thereof, an EDM method wherein a tool electrode and a workpiece electrode, one of which is movable, are spacedly juxtaposed with one another to define a machining gap therebetween in the presence of a liquid machining medium, and a succession of electrical discharges are effected between the tool electrode and the workpiece electrode across the machining gap to electroerosively remove material from the workpiece electrode, which method comprises: (a) supporting the movable electrode with a machine-head spindle; (b) sensing electrical conditions in the machining gap for operating first motor means drivingly coupled with the machine-head spindle to move the movable electrode towards and away from the other electrode so as to maintain the machining gap substantially constant in size by axially displacing the spindle; (c) mechanically coupling between the machine-head spindle and the movable electrode an electrode reciprocating assembly comprising a rotary member, second motor means drivingly coupled with the rotary member and rotation-to-rectilinear motion converting link
  • the method further comprises determining the rate of rotation of the reciprocating rotated rotary member to set the period of rectilinear reciprocatory movement of the movable electrode at a desired value.
  • the method may further comprise changing at least one of the said angle and rate of rotation in accordance with a preprogrammed format during a given course of EDM operation.
  • the method may further comprise sensing the position of the tool electrode being progressively sunk into the workpiece electrode during a given course of EDM operation and controlling at least one of the said angle and rate of rotation so as to change in accordance with the sensed position of the tool electrode during the course of EDM operation.
  • the method may further comprise sensing EDM characteristics in the machining gap and controlling at least one of the said angle and rate of rotation so as to change in accordance with the sensed EDM characteristics during a given course of EDM operation.
  • the method should further comprise interrupting the operation of the first motor means for a predetermined time period and causing the second motor means to operate selectively during the said time period.
  • the method may further comprise the steps of (f) forcibly supplying the liquid machining medium into the machining gap and (g) synchronizing the operations of steps (d) and (f).
  • FIG. 1 is a schematic side view partly in elevational section and partly in block form, diagrammatically illustrating a structure embodying the present invention.
  • FIG. 2 is a schematic elevational view partly in section illustrating an essential portion of another embodiment of the present invention.
  • a tool electrode 1 is shown spacedly juxtaposed with a workpiece electrode 2 to define a machining gap 3 therebetween.
  • the workpiece 2 is securely mounted on a work support 4 situated in a work tank 5 which contains a liquid dielectric or machining medium 6 (e.g. kerosene, transformer oil, distilled water or weakly conductive water) and which is in turn situated on a work table 7.
  • the liquid machining medium 6 is shown supplied from a nozzle 8 which communicates via a valve 9 and a filter 10 with a reservoir 11.
  • a pump 12 is provided between the filter 10 and the valve 9, the latter being of electromagnetic type and controlledly opened and closed by a valve-control circuit 13.
  • a relief valve 14 is also provided and arranged in shunt across the pump 12 and the filter 10 to return the pumped liquid to the reservoir 11 when the valve 9 is closed.
  • the spent machining liquid 6 in the work tank 5 is returned to the reservoir 11 via an outlet conduit 15.
  • the tool electrode 1 is supported movably with a machine-head spindle 16 which is here vertical and movably supported with a machine head or ram (not shown) and with which a first motor 17 is drivingly coupled by means of, for example, a rack 18 and pinion 19.
  • the motor 17 is operated by a servo circuit 20 in response to a gap signal, e.g. gap voltage, for axially displacing the spindle 16 to vertically move the tool electrode 1 towards and away from the workpiece 2 so as to maintain the machining gap 3 substantially constant in size.
  • a gap signal e.g. gap voltage
  • the machine-head spindle 16 has an enlarged plate 21 to which an electrically insulating plate 22 is securedly held by means of bolts 23.
  • the tool electrode 1 is securely fixed by means of clamps and bolts 24 to an electrode attachment plate 25.
  • An EDM power supply 26 has a pair of output terminals 26a and 26b which are electrically connected to the electrically conductive attachment plate 25 and the electrically conductive work support 4, respectively, to apply a succession of EDM pulses between the tool electrode 1 and the workpiece electrode 2 across the machining gap 3.
  • EDM pulses between the tool electrode 1 and the workpiece electrode 2 across the machining gap 3.
  • the electrode attachment plate 25 or the tool electrode 1 itself is directly secured to the metallic plate 21 by means of bolts 23 or to the insulator plate 22 by means of bolts 27.
  • an electrode reciprocating assembly 28 is mechanically coupled between the machine-head spindle 16 and the tool electrode 1.
  • the assembly 28 shown includes a housing 29 detachably secured to the insulator plate 22.
  • An eccentric cam 30 is accommodated in a compartment 29a defined by the housing 29 and has a rotary shaft 31 secured thereto.
  • the cam 30 is formed with a gear 32 in mesh with a gear 33 rotationally driven by a motor 34 which is mounted on the insulator plate 22.
  • the cam surface 30a of the cam 30 is here circular and in bearing contact with a plate 35 secured to a piston 36 at its upper end.
  • the piston 36 is here arranged coaxially with the machine-head spindle 16, i.e.
  • the motor 34 may be a stepping motor or a DC or AC motor equipped with an encoder for sensing the angle and preferably also the rate of rotation.
  • the motor 34 is energized by a cyclic drive signal furnished by a driver circuit 38.
  • Each cycle of the drive signal furnished by the driver circuit 38 consists of one half cycle of one polarity and the other half cycle of the other polarity which alternate.
  • the cam or eccentric rotary member 30 is reciprocating rotated through a limited angle ⁇ of rotation, the angle ⁇ being determined by the duration of the half cycle or one half of the period of the cyclic drive signal.
  • This reciprocatory rotary motion of the cam 30 is converted by the plate 35 or link into a corresponding rectilinear reciprocal motion of the piston 36 and hence of the tool electrode 1 vertically towards and away from the workpiece 2.
  • the stroke of the resulting reciprocation (rectilinear) of the tool electrode is determined by the angle of rotation ⁇ (0 ⁇ 180° C.).
  • the cam 30 has the position of origin when its maximum diameter, the diameter which intersects its center of rotation or shaft, is oriented vertically as shown.
  • the stroke of reciprocation of the tool electrode 1 corresponds to the difference between its lowermost and uppermost positions. These positions are taken by the tool electrode when the cam 30 lies at the original position and when it is rotated by an angle ⁇ , respectively. In typical EDM operations, the stroke should range between 0.005 and 1.0 mm and preferably between 0.01 and 0.5 mm.
  • the driver circuit 38 is provided with an electrode reciprocation stroke setting unit 38a which includes different settings for the angle of rotation ⁇ of the cam 30 (and hence corresponding settings of the angle of rotation of motor 34) to be selectively established.
  • the driver circuit 38 is provided with an electrode reciprocation period setting unit 38b which includes different settings for the rate of rotation d ⁇ /dt of the cam 30 (and hence the motor 34) to be selectively established.
  • the electrode reciprocation assembly is operated in conjunction with the servo-feed operation by the first motor 17 and the dielectric flushing operation by the nozzle 8.
  • a control unit 39 is thus provided to furnish respective control signals to the servo circuit 20, the driver circuit 38 and the valve-control circuit 13 via lines 40, 41 and 42, and additionally to the EDM power supply 26 via a line 43.
  • the control unit 39 is here provided also with two signal inputs. One signal comes from a gap sensing circuit 44 via a line 45 and the other signal comes from a machining depth detector 46 via a line 47.
  • the gap sensing circuit 44 responds to a gap voltage or current. This gap signal is passed through the control unit 39 and applied via line 40 to the servo circuit 20 which operates in a conventional manner to provide servo signals to the servo motor 17.
  • the gap signal may also be processed in the control unit 39 to result in the respective control signals which can be applied to the driver circuit 38, the EDM power supply 26 and the valve-control circuit 13.
  • the depth detector 46 responds to position signals which are sensed by an encoder 48 associated with the machine-head spindle 16. The position of the spindle 16 represents the position of the tool electrode 1 being progressively sunk into the workpiece electrode 2.
  • the control signal supplied to the valve-control circuit 13 via the line 42 is produced by the control unit 39 when the processing of gap signals incoming from the sensor 44 indicates that the liquid machining medium in the machining gap 3 has become contaminated beyond a certain level.
  • the control signal may be in the form of a succession of electrical pulses which periodically opens the electromagnetic valve 9 to allow the fresh machining medium drawn by the pump 12 from the reservoir 11 via the filter 10 to be intermittently flushed into the machining gap 3.
  • the rate of flow of the flushing liquid may be controlled depending on particular levels of the gap contamination.
  • the electrode-servo operation (especially advance or downward movement) by the motor 17 acting on the machine-head spindle 16 be interrupted while the electrode-reciprocation operation by the assembly 28 is being conducted.
  • the control unit 39 operates to furnish a gap flushing command signal to the valve-control circuit 13 and simultaneously to furnish an electrode reciprocation signal to the motor driver circuit 38 while applying a servo interruption signal to the servo motor driver circuit 17 for a predetermined time period or until a clarification of the gap contamination is indicated based upon gap signals furnished from the gap sensing circuit 44.
  • the machining depth detector 46 provides an electrode position signal which is processed by the control unit 39 to result in control signals which act on the setting units 38a and 38b to establish a particular stroke and period of the electrode reciprocation preselected to correspond to a particular depth of the tool electrode 1 in the workpiece sensed by the detector 46 and the associated encoder 48.
  • the EDM power supply 26 is also acted upon by a command signal furnished via the line 43 from the control unit 39 to suspend the application of machining electrical pulses to the tool and workpiece electrodes 1 and 2.
  • FIG. 2 shows another form of the electrode reciprocation assembly 28' embodied to utilize a crank arrangement.
  • This arrangement is shown comprising a circular disk 51 whose geared periphery 51a is in mesh with the gear 33 rotationally driven by the motor 34 to rotate about its center.
  • the disk 51 has a crankshaft 52 at a position slightly displaced from that center.
  • the crankshaft 52 is linked by a crank or connecting rod 53 and a crankpin 54 with the piston 36 secured to the electrode attachment plate 25.
  • the piston 36 is here slidably received in an opening 55 formed in the housing 29' at its lower portion.
  • the motor 34 is here again energized by a cyclic drive signal furnished from the driver circuit 38.
  • Each cycle of the drive signal furnished from the driver circuit 38 consists of one half cycle of one polarity and the other half cycle of the other polarity which alternate.
  • the disk 51 is reciprocating rotated through a limited angle of rotation, which is determined by the duration of the half cyclic or one half of the period of the cycle drive signal.
  • This reciprocatory rotary motion is here again converted, by the crank 53, into a corresponding rectilinear reciprocal motion of the piston 36.
  • the stroke and period of electrode reciprocation are accordingly determined by the angle and rate of rotation of the motor 34 and are set at the setting units 38a and 38b, respectively, in the motor driver circuit 38.
  • the actual machining time amounts only to one third (1/3) of the total machining time, the balance (2/3) being taken up by the electrode reciprocation.
  • the time for reciprocation can be reduced to one third (1/3) of the total machining time, the remaining time being used for actual machining.
  • the reciprocation of the tool electrode 1 need not be limited to be in the vertical direction and may instead be effected in a horizontal plane or in a direction orthogonal to the vertical direction in which the spindle 16 is moved.
  • This form of electrode reciprocation may be used to enlarge an EDM cavity in the workpiece in a finishing operation by a desired size corresponding to the length of the stroke of reciprocation.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US06/289,147 1980-08-05 1981-08-03 EDM Machine tool with compounded electrode-reciprocation and servo-feed drivers Expired - Lifetime US4430544A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP55-106726 1980-08-05
JP10672680A JPS5733923A (en) 1980-08-05 1980-08-05 Electric discharge machining device

Publications (1)

Publication Number Publication Date
US4430544A true US4430544A (en) 1984-02-07

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US06/289,147 Expired - Lifetime US4430544A (en) 1980-08-05 1981-08-03 EDM Machine tool with compounded electrode-reciprocation and servo-feed drivers

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US (1) US4430544A (de)
JP (1) JPS5733923A (de)
DE (1) DE3131056A1 (de)
FR (1) FR2488176B1 (de)
GB (1) GB2081632B (de)
IT (1) IT1142968B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324907A (en) * 1993-09-03 1994-06-28 B&W Nuclear Service Company EDM apparatus with a cam arm for moving an electrode
EP1097774A1 (de) * 1999-11-04 2001-05-09 ECM GbR, Harder, Nase, Semashko, Wacht, Wacht Einrichtung, insbesondere zur elektro-chemischen Bearbeitung von Metallen
US6385500B1 (en) * 1999-04-16 2002-05-07 Cummins Engine Company, Inc. Hybrid servomechanism for micro-electrical discharge machining
US20050109634A1 (en) * 2003-11-25 2005-05-26 Rainer Mielke Apparatus for electrochemical precision machining
US20080041826A1 (en) * 2004-03-19 2008-02-21 James Marion Vau Apparatus and method for electrical discharge machining
CN101961805A (zh) * 2010-10-22 2011-02-02 浙江工业大学 异形截面深小孔机械振动电解加工装置
CN103372696A (zh) * 2012-04-25 2013-10-30 鸿富锦精密工业（深圳）有限公司 振动进给装置
US20140131318A1 (en) * 2012-11-14 2014-05-15 General Electric Company Electric discharge machining die sinking device and related method of operation
EP3015210A2 (de) * 2014-09-11 2016-05-04 MTU Aero Engines GmbH Elektrochemische bearbeitung eines werkstücks
WO2016149616A3 (en) * 2015-03-19 2016-12-29 Johnson Technology, Inc. Electrical discharge machining integrated control system
CN110539043A (zh) * 2019-09-26 2019-12-06 哈尔滨理工大学 一种电解加工振动进给运动实现装置
RU2751497C1 (ru) * 2021-01-12 2021-07-14 Общество С Ограниченной Ответственностью "Есм" Осциллятор для генерирования продольных механических колебаний

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JPS58192720A (ja) * 1982-04-28 1983-11-10 Inoue Japax Res Inc 放電加工装置
JPS6114816A (ja) * 1984-06-26 1986-01-23 Mitsubishi Electric Corp 放電加工装置
JPS61103725A (ja) * 1984-10-25 1986-05-22 Inoue Japax Res Inc ワイヤカツト放電加工方法
JPS61173821A (ja) * 1985-01-24 1986-08-05 Amada Co Ltd 放電加工装置
JPS62255013A (ja) * 1986-04-28 1987-11-06 Toyota Motor Corp 電解加工装置
JPH07102484B2 (ja) * 1986-04-28 1995-11-08 株式会社井上ジャパックス研究所 放電加工装置
US4800006A (en) * 1986-10-30 1989-01-24 Shizuoka Seiki Co., Ltd. Electrolytic finishing system and method
EP0308246A1 (de) * 1987-09-17 1989-03-22 Shizuoka Seiki Co. Ltd. Verfahren zum elektrolytischen Fertigstellen
JPH01205918A (ja) * 1988-02-13 1989-08-18 Shizuoka Seiki Co Ltd 電解加工による仕上げ加工方法
JPH02109636A (ja) * 1988-10-20 1990-04-23 Shizuoka Seiki Co Ltd 電解仕上げ加工方法

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CH595184A5 (de) * 1976-05-05 1978-02-15 Charmilles Sa Ateliers

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324907A (en) * 1993-09-03 1994-06-28 B&W Nuclear Service Company EDM apparatus with a cam arm for moving an electrode
US6385500B1 (en) * 1999-04-16 2002-05-07 Cummins Engine Company, Inc. Hybrid servomechanism for micro-electrical discharge machining
EP1097774A1 (de) * 1999-11-04 2001-05-09 ECM GbR, Harder, Nase, Semashko, Wacht, Wacht Einrichtung, insbesondere zur elektro-chemischen Bearbeitung von Metallen
WO2001032343A1 (de) * 1999-11-04 2001-05-10 Ecm Gbr, Harder, Nase, Semashko, Wacht, Wacht Einrichtung, insbesondere zur elektro-chemischen bearbeitung von metallen
US20050109634A1 (en) * 2003-11-25 2005-05-26 Rainer Mielke Apparatus for electrochemical precision machining
EP1535685A2 (de) * 2003-11-25 2005-06-01 Rolls-Royce Deutschland Ltd & Co KG Vorrichtung zur präzisen elektrochemischen Bearbeitung
EP1535685A3 (de) * 2003-11-25 2006-08-16 Rolls-Royce Deutschland Ltd & Co KG Vorrichtung zur präzisen elektrochemischen Bearbeitung
US7318884B2 (en) 2003-11-25 2008-01-15 Rolls-Royce Deutschland Ltd & Co Kg Apparatus for electrochemical precision machining
US20080041826A1 (en) * 2004-03-19 2008-02-21 James Marion Vau Apparatus and method for electrical discharge machining
US7378611B2 (en) * 2004-03-19 2008-05-27 General Electric Company Apparatus and method for electrical discharge machining
CN101961805A (zh) * 2010-10-22 2011-02-02 浙江工业大学 异形截面深小孔机械振动电解加工装置
US20130284592A1 (en) * 2012-04-25 2013-10-31 Hong Hai Precision Industry Co., Ltd. Vibration feeding device
CN103372696B (zh) * 2012-04-25 2016-11-16 安徽省鸿庆精机有限公司 振动进给装置
CN103372696A (zh) * 2012-04-25 2013-10-30 鸿富锦精密工业（深圳）有限公司 振动进给装置
US9163323B2 (en) * 2012-04-25 2015-10-20 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Vibration feeding device
CN103801772A (zh) * 2012-11-14 2014-05-21 通用电气公司 电火花加工刻模装置和相关操作方法
US9452483B2 (en) * 2012-11-14 2016-09-27 General Electric Company Electric discharge machining die sinking device and related method of operation
US20140131318A1 (en) * 2012-11-14 2014-05-15 General Electric Company Electric discharge machining die sinking device and related method of operation
CN103801772B (zh) * 2012-11-14 2018-10-16 通用电气公司 电火花加工刻模装置和相关操作方法
EP3015210A2 (de) * 2014-09-11 2016-05-04 MTU Aero Engines GmbH Elektrochemische bearbeitung eines werkstücks
US10137516B2 (en) 2014-09-11 2018-11-27 MTU Aero Engines AG Electrochemical machining of a workpiece
WO2016149616A3 (en) * 2015-03-19 2016-12-29 Johnson Technology, Inc. Electrical discharge machining integrated control system
CN110539043A (zh) * 2019-09-26 2019-12-06 哈尔滨理工大学 一种电解加工振动进给运动实现装置
CN110539043B (zh) * 2019-09-26 2020-10-30 哈尔滨理工大学 一种电解加工振动进给运动实现装置
RU2751497C1 (ru) * 2021-01-12 2021-07-14 Общество С Ограниченной Ответственностью "Есм" Осциллятор для генерирования продольных механических колебаний

Also Published As

Publication number Publication date
FR2488176B1 (fr) 1985-11-15
IT8149054A0 (it) 1981-08-05
DE3131056A1 (de) 1982-03-11
FR2488176A1 (fr) 1982-02-12
JPS5733923A (en) 1982-02-24
GB2081632A (en) 1982-02-24
GB2081632B (en) 1984-07-25
IT1142968B (it) 1986-10-15

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